{x+2y=7 {xy=3 помогите!!!

$\left \{ {{x+2y=7} \atop {xy=3}} \right.$
$\left \{ {{x=7-2y} \atop {xy=3}} \right.$

y (7 - 2y) = 3
7y - 2y² = 3
- 2y² + 7y - 3 = 0
D = 7² - 4 * (- 2) * (- 3) = 25
x₁ = (- 7 + √25) : (- 4) = 0,5
x₂ = (- 7 - √25) : (- 4) = 3

$\left \{ {{y=0,5} \atop {0,5x=3}} \right.$
$\left \{ {{y=0,5} \atop {x = 6}} \right.$

$\left \{ {{y=3} \atop {3x=3}} \right.$
$\left \{ {{y=3} \atop {x=1}} \right.$

Ответ: (6; 0,5) и (1; 3).